PLATE XLVIII. 



FIG. 



1. Smittia reticulata, p. 346; witli ooecia. 



-, var. 



3, ■, monstrosity; imion of two cells. 



4. , young cell. 



, outline of a single adult cell. 



o. 



6. Smittia Landsborovii, p. 341. 



7. . , old and liiglily calcified. 



8. , Avith the peristome sliglitly developed. 



9. with elongate and narrow cells. 



